Finding the Fourth Proportional to 1,987.58, 2,982.38 and 818.48

Step by Step Solution

1. Step 1: Write the proportion equation
   1,987.58 : 2,982.38 = 818.48 : x
2. Step 2: Convert to fraction form
   1,987.58/2,982.38 = 818.48/x
3. Step 3: Cross multiply
   1,987.58x = 2,982.38 × 818.48
4. Step 4: Simplify right side
   1,987.58x = 2,441,018.38
5. Step 5: Solve for x
   x = 2,441,018.38/1,987.58
6. Step 6: Final answer
   x = 1,228.14